propulsion controls and diagnostics research at nasa grc – status report
DESCRIPTION
Propulsion Controls and Diagnostics Research at NASA GRC – Status Report. Dr. Sanjay Garg Branch Chief Ph: (216) 433-2685 FAX: (216) 433-8990 email: [email protected] http://www.lerc.nasa.gov/WWW/cdtb. Presented at: Aerospace Guidance and Control System Committee Meeting - PowerPoint PPT PresentationTRANSCRIPT
Controls and Dynamics Branch at Lewis FieldGlenn Research Center
Propulsion Controls and Diagnostics Research at NASA GRC – Status Report
Dr. Sanjay GargBranch Chief
Ph: (216) 433-2685FAX: (216) 433-8990
email: [email protected]://www.lerc.nasa.gov/WWW/cdtb
Presented at: Aerospace Guidance and Control System Committee MeetingBoulder, CO, March 1, 2007
Aeronautics Research Mission Directorate
Hypersonics
Fundamental Aeronautics Program
Aviation Safety Program
Airspace Systems Program
Supersonics
Subsonic Fixed Wing
Subsonic Rotary Wing
Integrated VehicleHealth
Management
Next Generation
AirTransportation
System
Super-DensitySurface
Management
Integrated Resilient Aircraft Control
Integrated Flight Deck
TechnologiesAging
Aircraft
NASA Aeronautics’ Program Structure
Controls and Dynamics Branch at Lewis FieldGlenn Research Center
Propulsion Control for Fundamental Aeronautics
Fundamental Aeronautics Program
HypersonicsSupersonicsSubsonicFixed Wing
SubsonicRotary Wing
• Distributed Engine Control
• Active Flow Control for Compression Systems
• Unsteady Combustion / Ejection Systems
• Integrated Engine and Transmission control
• Active Combustion Control
• Integrated inlet / engine control
• High Speed propulsion control and integration with flight control
• Mode Switch management
Controls and Dynamics Branch at Lewis FieldGlenn Research Center
Propulsion Control and Diagnostics for Aviation Safety
Aviation Safety Program
AADIIFDIntegrated Vehicle Health Management
Integrated Resilient Aircraft Control
• Self awareness and prognosis of gas path, combustion, and overall engine state; fault-tolerant system architecture
• Gas Path health management
•…..
• Damage tolerance and design for extended envelope operation; onboard hazard effects assessment, mitigation and recovery
Propulsion HealthManagement
………
Resilient PropulsionControl
………
CPU /Memory
Actuationelectronics
Sensorelectronics
Sensorelectronics
Actuationelectronics
Sensorelectronics
Actuationelectronics
Actuator_1
Sensor_1
Sensor_ j
Actuator_n
Sensor_2
Actuator_2
Communication
Power
BU
S
FADEC
Current Engine Control ArchitectureCurrent Engine Control Architecture• Centralized with each sensor/actuator directly connected to FADEC
Controls and Dynamics Branch at Lewis FieldGlenn Research Center
Centralized Engine ControlCentralized Engine Control
• Pros: – Works, reliable, well-understood, experience,
comfort level• Cons:
– Expensive, inflexible, in the future will become a limiting factor in engine performance
– Wire harness weight forces the FADEC to be co-located on the engine structure
– Co-located FADEC requires environmental hardening (thermal, mechanical) further increasing weight and cost.
– Complicates fault detection and isolation
CPU /Memory
Actuator_1
Sensor_1
Sensor_ j
Actuator_n
Sensor_2
Actuator_2
Communication
Power
FADEC
Distributed Engine ControlDistributed Engine Control
Communication
Actuationelectronics
Sensorelectronics
Sensorelectronics
Actuationelectronics
Sensorelectronics
Actuationelectronics
BU
S
Controls and Dynamics Branch at Lewis FieldGlenn Research Center
Distributed Engine ControlDistributed Engine Control
• Topologies:– Star (point to point), Ring or bus (daisy chain)– Wired or wireless
• Pros: – Known to work well in other industries, much less
expensive (initial and overall cost), very flexible• Cons:
– Communication unknowns and deterministic behavior
– Overall increased complexity– Requires new technologies, i.e., high temperature
electronics